Mechanically-fed lead pencil



April 8, 1930. R. c. STOWE MECHANICALLY FED LEAD PENCIL Filed July 121926 INVENTOR. 4 g 6': cfzzo'e. BY

Fatented Apr. Whd

RWY G. @TU'WE, @F FRQVTDENGE, RHODE ISLAND, ASSIGNOB, TO A. T. CROSSPENCIL CO 9F PROVIDENCE, RHDDE ISLAND, A CORPORATION @F RHUDE ISLANDlllllEQHANTCALLY-FEJD LEAD PENCIL This invention relates to animprovement in the construction of mechanically fed lead pencils; andhas for its object to provide in such a. pencil a point end member forsecuring the lead-propelling movement in the barrel of the pencil.

A further object of the invention is the housing of the mechanicalmovement in a tubular member attached to the stub or eraser end of thepencil which assembles the lead propelling movement as a unit andthrough which the lead is operated.

With these and other objects in view, the invention consists of certainnovel features of construction, as will be more fully described, andparticularly pointed'out in the appended claims.

Tn the accompanying drawings:

Figure 1 is a sectional elevation of the pencil with portions brokenaway to better illustrate its construction.

Figure 2 is a side elevation of the propelling movement which is securedin the barrel portion.

Figures 3, l, 5, 6, 7, 8, and 9 are details of difierent working partsof the pencil.

Figure 10 is a sectional side elevation illustrating the detailsheretofore mentioned assembled with the exception of the point end 3@member Figure 7 ][t is found in the manufacture of mechanically actuatedpencils desirable to eliminate as many soldering operations in theassembly of the pencil as possible and also desirable to have the entirepropelling movement in unit form such that it may be readily assembledor placed in the barrel of the pencil to be locked or held therein, andby providing a threaded portion at the end of the bushing member of thepropelling movement and providing a threaded point end member to bescrewed onto the threaded end, simple and efiective means are providedfor securing the propelling unit in its casing and so reducing the 25cost of manufacture in assembling the pencil parts; and the following isa detailed description of the present embodiment of this invention andshowing one construction of pencil 'by which these advantageous resultsmay be accomplished With reference to the drawings, 10 designates thebarrel portion or body of a pencil with a tapered sleeve 12 attached toone end of the barrel through the plug 11. In a pencil having a metalbarrel the sleeve and barrel portion might be one piece if desired thusdoing away with the necessity of the connecting plug 11 which I employwhere a nonmetallic barrel is used.

Figure 2 illustrates a complete propelling movement unit which comprisesa bushing 13 and a housing portion 14; rotatable relative to the bushingfor propelling the lead of the pencil. The bushing member 13 which isshaped externally to fit the tapered sleeve 12 threaded throughout itslength as at 15 to be secured onto the threaded end 15 of the tube 19,the sleeve being further secured on the tube by solder, if desired. Inorder to draw this tapered bushing down into the sleeve 12suflicientlyto bind and hold it against rotation therein, T haveprovided a point end member 16 which is preferably formed of a solidpiece of metal with a threaded opening 17 to be screwed into the threads15 on the extending end of the guide tube and also with a shoulder 18 toengage the end of the tapered sleeve. Also this point end member isprovided with a reduced portion 32 arranged to extend up into the end ofthe sleeve to support and center the end member relative to the adjacentparts.

This guide tube 19 is mounted within the housing member 14; and in thistube there is slidably mounted lead carrier 20 and ejector 21, eachhaving a finger 22 and 23 respectively, to be guided in the slot 24 inthe tube. v

A. worm or screw 25 is rotatably mounted about the tube 19 and heldagainst displacement by means of a ring or Washer 31. This screw has ahelical groove 26 which receives the fingers 22 and 23 of the leadcarrier and ejector. The housing 14: envelops the screw 25 to frict'nally engage the screw as at 27 so that a rotating movement of thehousing will transmit a corresponding movement to the screw to operatethe lead carrier of the pencil.

At the opposite end of the housing 14 there is mounted a head member 28which comprises a tubular eraser-receiving cup 29 and a cap 30 thereoverand this head member is rotatable relative to the barrel to impart arotative movement for retractingsor propelling and expelling the lead 32in the lead carrier in the manner as will be apparent from the abovedescription.

It will thus be seen that I have provided a mechanically operated pencilin which the y no propelling movement is a complete unit which may beplaced within the barrel of the pencil and locked therein by a point endmember without the use of solder. The point end member may be made solidand of steel if desired to provide a protection for the lead, while thesleeve and head end member or a non-metallic barrel as illustrated, orthe enthe barrel and sleeve may be made of precious metal forornamentation.

The foregoing description is directed solely towards the constructionillustrated, but I desire it to be understood that I reserve theprivilege of resorting to all the mechanical changes to which the deviceis susce tible, the invention being defined and limite only by the termsof the appended claims.

I claim:

1. In a mechanically operated pencil, a barrel portion, a tapered sleevesecured to one end thereof, a tapered bushing in said sleeve,

a lead propelling movement in said barrel including a guide tubethreaded through said bushing, a point end member having a shoulderengaging the end of said tapered sleeve and screwed onto the threadedend of said tube todraw the same into the sleeve and secure it against.rotation relative to said sleeve or barrel. I

. 2. In a mechanically operated pencil, a

barrel portion, a tapered sleeve secured to one end thereof, a taperedbushing in said sleeve,

a lead propelling movement in said barrel including a and threade thrusaid bushing, a worm rotatably mounted on and secured to said guide 'idetube threaded on its end tube, a point end member having a shoulderengaging the end of said tapered sleeve and screwed onto thethreaded-end of said guide ;tube draw the same into the sleeve andsecure t aga nst rotation relative to said sleeve or barrel.

:3. In a mechanically operated pencil, a"

barrel ending in a tapered sleeve portion, a lead propelling movementunit including a tapered bushing in said sleeve portion and a threadedmember secured to and projecting beyond said bushing, and a point endmembenengagmg said threaded member for securing said movement in saidbarrel.

In testimony whereof I aifix my si nature. ROY o. s'rown.

